6819845 has 16 divisors (see below), whose sum is σ = 8819712. Its totient is φ = 5047680.

The previous prime is 6819829. The next prime is 6819847. The reversal of 6819845 is 5489186.

It is not a de Polignac number, because 6819845 - 2⁴ = 6819829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6819847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2609 + ... + 4521.

It is an arithmetic number, because the mean of its divisors is an integer number (551232).

Almost surely, 2^6819845 is an apocalyptic number.

It is an amenable number.

6819845 is a deficient number, since it is larger than the sum of its proper divisors (1999867).

6819845 is a wasteful number, since it uses less digits than its factorization.

6819845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972.

The product of its digits is 69120, while the sum is 41.

The square root of 6819845 is about 2611.4832949877. The cubic root of 6819845 is about 189.6377678357.

The spelling of 6819845 in words is "six million, eight hundred nineteen thousand, eight hundred forty-five".